New research challenges the notion that people grow happier with age.

Researchers led by psychology lecturer Dr. Helena Chui of the University of Bradford found that people get more depressed from age 65 onwards.

"These findings are very significant and have implications for how we deal with old age. It's the first study to tell us depressive symptoms continue to increase throughout old age. We are in a period of unprecedented success in terms of people living longer than ever and in greater numbers and we should be celebrating this but it seems that we are finding it hard to cope," Chui said.

For the study, researchers collected and analyzed data from more than 2,000 older Australians living in the Adelaide area. Both men and women taking part in the study reported increasingly more depressive symptoms as they aged, with women initially starting with more depressive symptoms than men. However, men showed a faster rate of increase in symptoms so that the difference in the genders was reversed at around the age of 80.

Investigators found that key factors in these increases include levels of physical impairment, the onset of medical conditions, particularly chronic ones, and the approach of death. Half of those in the study suffered with arthritis and both men and women with the chronic condition reported more depressive symptoms than those without.

Previous studies have shown an increase in depressive symptoms with age but only until the age of 85. This is the first study to examine the issue beyond that age.

"It seems that we need to look carefully at the provision of adequate services to match these needs, particularly in the area of mental health support and pain management. Social policies and ageing-friendly support structures, such as the provision of public transport and access to health care services are needed to target the 'oldest-old' adults as a whole," Chui said.

The findings are detailed in the international journal Psychology and Aging.